Time & Work / Pipes — practice questions, page 9
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QuestionTwo pipes A and B can fill a tank in 20 and 30 minutes respectively. Both are opened together, but…QuestionThree pipes can fill a tank in 10, 15 and 30 hours respectively. If all three are opened together,…QuestionA can do a work in 15 days and B in 20 days. They work together for 6 days, after which A leaves.…QuestionA is twice as efficient as B. Working together they complete a work in 8 days. How many days would…Question6 women can complete a work in 18 days. 3 women start the work, and after 6 days 3 more women join…QuestionTwo inlet pipes feed a village water tank. The first can fill it alone in 9 hours and the second…QuestionA hose fills an aquarium in 4 hours, but a crack in the glass drains a full aquarium in 20 hours.…QuestionA school's overhead tank is fed by two taps. The first tap alone fills it in 42 minutes and the…QuestionRekha can stitch a batch of 30 shirts in 6 days; Sunita takes 10 days for the same batch. How many…QuestionVinod and Wasim can finish a task alone in 20 and 30 days. They begin together, but Vinod leaves 5…QuestionYamini works three times as fast as Zoya. Together they finish a mural in 9 days. How many days…QuestionTwo masons, Iqbal and Prakash, work at daily outputs in the ratio 7 : 5. Together they plaster a…QuestionRamesh alone can bind a consignment of registers in 28 days, Suresh alone in 21 days and Vikas…QuestionFarida alone can finish a tailoring order in 16 days and Gita alone in 24 days. They agree to work…QuestionVinod can grade a whole set of examination scripts in 30 days at a steady pace. He holds that pace…QuestionA repair contract is worth ₹42,000. Nitin alone could do it in 18 days and Omkar alone in 27 days.…QuestionA storage tank has two inlets. The first alone would fill it in 45 minutes and the second alone in…QuestionAn overhead cistern of capacity 3,600 litres stands empty. Two inlets, delivering 90 litres and 60…QuestionA pipe starts filling an empty tank at 8:00 a.m. and on its own would fill it in 9 hours. At 11:00…QuestionA cistern stands one-third full. Its inlet alone fills the whole cistern in 24 minutes and its…QuestionA printing order is measured as 5,400 impression-units. Machine P turns out 45 units an hour,…QuestionSohan, Tarun and Umesh can each finish a carpentry job on their own in 16, 24 and 48 days…QuestionA contractor promised to hand over a job on the 30th day and put 20 equally skilled workers on it.…QuestionCable-laying teams X and Y together can lay a stretch in 9 days; teams Y and Z together can lay it…QuestionA set of records was to be keyed in by a certain number of clerks in 12 days. Had 4 more clerks…
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